(Phys.org) —It's a man's world for fish in a San Francisco Bay-Delta estuary. Silverside fish collected from an urban beach in Suisun Marsh were more masculinized, but with smaller and less healthy gonads, ...

Frogs appear to be very sensitive to progestogens, a kind of pharmaceutical that is released into the environment. Female tadpoles that swim in water containing a specific progestogen, levonorgestrel, are subject to abnormal ...

Many risk factors for breast cancer are well studied and documented. Thus, scientists are sure by now that early first menstrual period, late onset of menopause and a family history of breast cancer are associated with an ...

While endogenous estrogen (i.e., estrogen produced by ovaries and by other tissues) does have a well-known carcinogenic impact, hormone replacement therapy (HRT) utilizing estrogen alone (the exogenous estrogen) provides ...

New research has provided the first evidence that 'gender bending' chemicals which find their way from human products into rivers and oceans can have a significant impact on the ability of fish to breed in UK Rivers.

Breast cancer incidence declined among postmenopausal women in Canada as their use of hormone therapy declined, according to a study published online September 23 in The Journal of the National Cancer Institute.

If you've ever watched a woman go from perfectly calm, cool and collected one minute to uncomfortable, red-faced and fanning herself frantically the next, then you've likely witnessed a hot flash. Now imagine ...

Although having a high body mass index (BMI) is a known risk factor for cardiovascular disease, researchers are only beginning to understand how BMI affects the physiological processes involved in the development of the disease. ...

Progestins are used in hormone replacement therapies to counteract the negative effects of estrogen on the uterus and reduce the risk of uterine cancer. However, evidence in recent studies and clinical trials has demonstrated ...

Results from a new study suggest that oral contraceptives and hormone replacement therapy (HRT) may yield additional benefit of protecting against the formation and rupture of brain aneurysms in women. The findings from this ...

Scientists already know much about the more than 200 bones that make up your body. But mysteries remain regarding the exact role that many natural compounds in foods might play in strengthening our skeletons. Those compounds ...

This month's Ophthalmology, the journal of the American Academy of Ophthalmology, includes new studies on links between eye diseases and two widely-prescribed drugs: SSRI (selective serotonin reuptake inhibitor) antidepressants, and am ...